Luca had been hesitant to return to his life, but after the incident with the man in Sophia's bakery and the person taking a picture of him, he had a feeling he could protect her better if he knew what he was working with.
After he left the bakery with the four others, they walked down the street to two black luxury sedans. One of the back doors was opened for Luca and the other one was opened for his assistant. There was already a driver in the front seat and the two other men who had joined them went to the other car and drove away quickly.
Since Luca didn't know who these people were to him, he felt on edge. Not only did it feel wrong to leave Sophia behind, he felt like he was walking into a pit of lions of his own volition except, with his lack of memories, he wasn't equipped to get out of there alive.